[Koha] How to update two koha databases in different servers.

I have two koha installations. One on a production server and another on a standby back-up server. Is there a way I can have all the changes made to the database on the production server also updated to the standby back-up server? I am thinking of doing it using an entry in a cronjob  file that runs once everyday at night. If possible, I only need to import the updates. Thanks in advance.